GASKET 6L8037 - Caterpillar

Clean the Heat Exchanger
Remove the heat exchanger from the engine. Refer to the Disassembly and Assembly Manual, "Heat Exchanger - Remove" for the procedure.
Remove the heat exchanger core from the heat exchanger. Refer to the Disassembly and Assembly Manual, "Heat Exchanger - Disassemble" for the procedure.
Turn the heat exchanger core onto one side in order to remove debris. Remove the debris that is accessible.
Do not use a high concentration of caustic cleaner to clean the core. A high concentration of caustic cleaner can attack the internal metals of the core and cause leakage. Only use the recommended concentration of cleaner.
Back flush the heat exchanger core with cleaner. Caterpillar recommends the use of Hydrosolv liquid cleaner. Table 1 lists Hydrosolv liquid cleaners that are available from your Cat dealer.
Table 1
Hydrosolv Liquid Cleaners(1)
Part Number Description Size
1U-5490 Hydrosolv 4165 19 L (5 US gallon)
174-6854 Hydrosolv 100 19 L (5 US gallon)
(1) Use a 2 to 5 percent concentration of the cleaner at temperatures up to 93°C (200°F). Consult your Cat dealer for more information.
Clean the heat exchanger core with steam to remove any residue. Flush the fins of the heat exchanger. Remove any other trapped debris from the inside and from the outside of the core.
Wash the heat exchanger core with hot, soapy water.
Flush the heat exchanger core thoroughly in order to remove residue and remaining debris. Flush the heat exchanger core with clean, fresh water until the water that is exiting the core is clear and free of debris.
Personal injury can result from air pressure.Personal injury can result without following proper procedure. When using pressure air, wear a protective face shield and protective clothing.The maximum air pressure for cleaning purposes must be reduced to 205 kPa (30 psi) when the air nozzle is deadheaded.
Dry the heat exchanger core with compressed air. Direct the air in the reverse direction of the normal flow. Test the Heat Exchanger Core
Inspect the heat exchanger core for trapped debris and cleanliness. If necessary, remove the debris and repeat the cleaning procedure.
Inspect the heat exchanger core for damage and perform a pressure test in order to detect leaks. Many shops that service radiators are equipped to perform pressure tests.
Plug both ends of the heat exchanger core and pressurize the core to 100 kPa (14.5 psi). Submerge the core in water. Look for bubbles which are being emitted from the core. The bubbles are evidence of leaks.
If any leaks are found, do not attempt to repair the core.
Install a core that is clean and that passes the pressure test in step 3. Refer to the Disassembly and Assembly Manual, "Heat Exchanger - Assemble" for the procedure.
Install the heat exchanger onto the engine. Refer to the Disassembly and Assembly Manual, "Heat Exchanger - Install" for the procedure. For more information on cleaning the core, consult your Cat dealer.